Abstract: Provided is a method for interplanting grape and Polygonatum kingianum in a photovoltaic (PV) power plant. The method includes: building a grapevine traction frame which is higher in south and lower in north in a space formed by a plurality of PV modules in the PV power plant, the grapevine traction frame includes a plurality of uprights, a plurality of traction crossbars, a plurality of supporting bars and a wire mesh; making a grape ridge below the south of each PV module and planting grape seedlings; maintaining two branches for each of the grape seedlings in the same year of grape planting, and pulling the two branches along the traction crossbar located in south; pulling branches grown out of arm bud points southwards onto the wire mesh in the next year of grape planting; sowing and ploughing a green manure, making planting beds in a shade and planting Polygonatum kingianum.